How to install a belt without a ac compressed and how do I put a ac on

What is your question?

I can't find a video on ac installation. I bought the car and was told some one tryed to weld a compressed to it and messed up the ac mounts. I was thinking of trying to re tap the mounts to try and get one on. I'm not sure I can tho so if I can get help with putting a belt on it without a ac. I'd appreciate it. I've done it with other cars but this one is tricky.